1 /* $OpenBSD: auth.h,v 1.41 2002/09/26 11:38:43 markus Exp $ */
2 /* $FreeBSD: src/crypto/openssh/auth.h,v 1.10 2003/03/31 13:45:36 des Exp $ */
5 * Copyright (c) 2000 Markus Friedl. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include <openssl/rsa.h>
37 #include <login_cap.h>
46 typedef struct Authctxt Authctxt;
47 typedef struct Authmethod Authmethod;
48 typedef struct KbdintDevice KbdintDevice;
65 char *krb4_ticket_file;
68 krb5_context krb5_ctx;
69 krb5_auth_context krb5_auth_ctx;
70 krb5_ccache krb5_fwd_ccache;
71 krb5_principal krb5_user;
72 char *krb5_ticket_file;
78 int (*userauth)(Authctxt *authctxt);
83 * Keyboard interactive device:
84 * init_ctx returns: non NULL upon success
85 * query returns: 0 - success, otherwise failure
86 * respond returns: 0 - success, 1 - need further interaction,
92 void* (*init_ctx)(Authctxt*);
93 int (*query)(void *ctx, char **name, char **infotxt,
94 u_int *numprompts, char ***prompts, u_int **echo_on);
95 int (*respond)(void *ctx, u_int numresp, char **responses);
96 void (*free_ctx)(void *ctx);
99 int auth_rhosts(struct passwd *, const char *);
101 auth_rhosts2(struct passwd *, const char *, const char *, const char *);
103 int auth_rhosts_rsa(struct passwd *, char *, Key *);
104 int auth_password(Authctxt *, const char *);
105 int auth_rsa(struct passwd *, BIGNUM *);
106 int auth_rsa_challenge_dialog(Key *);
107 BIGNUM *auth_rsa_generate_challenge(Key *);
108 int auth_rsa_verify_response(Key *, BIGNUM *, u_char[]);
109 int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **);
111 int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *);
112 int hostbased_key_allowed(struct passwd *, const char *, char *, Key *);
113 int user_key_allowed(struct passwd *, Key *);
117 int auth_krb4(Authctxt *, KTEXT, char **, KTEXT);
118 int auth_krb4_password(Authctxt *, const char *);
119 void krb4_cleanup_proc(void *);
123 int auth_krb4_tgt(Authctxt *, const char *);
124 int auth_afs_token(Authctxt *, const char *);
130 int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *);
131 int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
132 int auth_krb5_password(Authctxt *authctxt, const char *password);
133 void krb5_cleanup_proc(void *authctxt);
136 #include "auth-pam.h"
138 Authctxt *do_authentication(void);
139 Authctxt *do_authentication2(void);
141 Authctxt *authctxt_new(void);
142 void auth_log(Authctxt *, int, char *, char *);
143 void userauth_finish(Authctxt *, int, char *);
144 int auth_root_allowed(char *);
146 char *auth2_read_banner(void);
148 void privsep_challenge_enable(void);
150 int auth2_challenge(Authctxt *, char *);
151 void auth2_challenge_stop(Authctxt *);
152 int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **);
153 int bsdauth_respond(void *, u_int, char **);
154 int skey_query(void *, char **, char **, u_int *, char ***, u_int **);
155 int skey_respond(void *, u_int, char **);
157 int allowed_user(struct passwd *);
158 struct passwd * getpwnamallow(const char *user);
160 char *get_challenge(Authctxt *);
161 int verify_response(Authctxt *, const char *);
162 void abandon_challenge_response(Authctxt *);
164 struct passwd * auth_get_user(void);
166 char *expand_filename(const char *, struct passwd *);
167 char *authorized_keys_file(struct passwd *);
168 char *authorized_keys_file2(struct passwd *);
171 secure_filename(FILE *, const char *, struct passwd *, char *, size_t);
174 check_key_in_hostfiles(struct passwd *, Key *, const char *,
175 const char *, const char *);
177 /* hostkey handling */
178 Key *get_hostkey_by_index(int);
179 Key *get_hostkey_by_type(int);
180 int get_hostkey_index(Key *);
181 int ssh1_session_key(BIGNUM *);
183 /* debug messages during authentication */
184 void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2)));
185 void auth_debug_send(void);
186 void auth_debug_reset(void);
188 #define AUTH_FAIL_MAX 6
189 #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
190 #define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
192 #define SKEY_PROMPT "\nS/Key Password: "